Dextromethorphan / Guaifenesin Dosage

The information at Drugs.com is not a substitute for medical advice. ALWAYS consult your doctor or pharmacist.

Usual Adult Dose for:

Usual Pediatric Dose for:

Additional dosage information:

Usual Adult Dose for Cough

Immediate release: Dextromethorphan-guaifenesin 10 mg-200 mg oral capsule: 2 capsules every 4 hours/ not to exceed 12 capsules/day

Dextromethorphan-guaifenesin 5 mg-100 mg oral granule: 2 to 4 packets every 4 hours, not to exceed 6 doses/day
Dextromethorphan-guaifenesin 5 mg-100 mg/5 mL oral liquid: 10 mL to 20 mL every 4 hours, not to exceed 120 mL/day
Dextromethorphan-guaifenesin 10 mg-100 mg/5 mL oral liquid: 10 mL every 4 hours, not to exceed 60 mL/day
Dextromethorphan-guaifenesin 10 mg-200 mg/5 mL oral liquid: 10 mL every 4 hours, not to exceed 60 mL/day
Dextromethorphan-guaifenesin 10 mg-200 mg/15 mL oral liquid: 30 mL orally every 4 hours, not to exceed 6 doses in 24 hours
Dextromethorphan-guaifenesin 15 mg-200 mg/5 mL oral liquid: 10 mL every 6 hours, not to exceed 40 mL/day
Dextromethorphan-guaifenesin 20 mg-200 mg/10 mL oral liquid: 10 mL orally every 4 hours, not to exceed 6 doses in 24 hours
Dextromethorphan-guaifenesin 20 mg-200 mg/30 mL oral liquid: 30 mL orally every 4 hours, not to exceed 6 doses in 24 hours
Dextromethorphan-guaifenesin 20 mg-400 mg/5 mL oral liquid: 5 mL every 4 hours, not to exceed 6 doses in 24 hours
Dextromethorphan-guaifenesin 20 mg-400 mg/20 mL oral liquid: 20 mL orally every 4 hours, not to exceed 6 doses in 24 hours

Extended release:
Dextromethorphan-guaifenesin 30 mg-600 mg oral tablet, extended release: 1 or 2 tablets every 12 hours, not to exceed 4 tablets/day
Dextromethorphan-guaifenesin 60 mg-1200 mg oral tablet, extended release: 1 tablet every 12 hours. Not to exceed 2 tablets/day

Usual Pediatric Dose for Cough

12 years and older: Follow adult dosing

Dosing varies by product, please refer to specific labeling:

Dextromethorphan-guaifenesin 5 mg-100 mg oral granule:
6 to 12 years: 1 to 2 packets every 4 hours, not to exceed 6 doses/day
Under 6 years: Do not use

Dextromethorphan-guaifenesin 5 mg-100 mg/5 mL oral liquid:
6 to 12 years: 5 mL to 10 mL every 4 hours, not to exceed 60 mL/day
4 to 6 years: 2.5 mL to 5 mL every 4 hours, not to exceed 30 mL/day
Under 4 years: Do not use

Dextromethorphan-guaifenesin 10 mg-100 mg/5 mL oral liquid:
6 to 12 years: 5 mL every 4 hours, not to exceed 30 mL/day
2 to 6 years: 2.5 mL every 4 hours, not to exceed 15 mL/day
Under 2 years: Do not use

Dextromethorphan-guaifenesin 10 mg-200 mg/15 mL oral liquid:
6 to 12 years: 15 mL every 4 hours, not to exceed 30 mL/day
4 to 6 years: Ask a doctor
Under 4 years: Do not use

Dextromethorphan-guaifenesin 20 mg-200 mg/10 mL oral liquid
6 to 12 years: 5 mL every 4 hours, not to exceed 30 mL/day
2 to 6 years: 2.5 mL every 4 hours, not to exceed 15 mL/day
Under 2 years: Do not use

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Dialysis

Data not available

Other Comments

Dextromethorphan-guaifenesin should be administered with plenty of fluids.

Store oral liquid at room temperature (20C to 25C or 68F to 77F)

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